Candy bar blondies - Recipe Tweets

Ingredients

• 1 cup all-purpose flour
• 1/2 teaspoon baking powder
• 1/8 teaspoon baking soda
• 1/4 teaspoon salt
• 1 cup brown sugar
• 1/3 cup unsalted butter, melted
• 1 Tablespoon pure vanilla extract
• 1 large egg
• 1 1/2 cups chopped chocolate candy bars